The top seed took a similar lead in the second, earning another 5-2 lead after a marathon game on the Sharapova serve. The 2004 Wimbledon winner made one last stand as Kerber served for the match, nabbing her first break of the match, but Kerber held firm, breaking straight back to secure the win.
In all, it was a clean match from Kerber, who struck 18 winners to just five unforced errors throughout, converting five of 12 break point opportunities. For Sharapova, she showed encouraging signs with 22 winners but was undone by 31 unforced errors, and will ultimately rue her one-for-six break point conversion rate.
Standing between the German and a spot in the semifinals is either No.6 seed Caroline Garcia or Spanish wildcard Paula Badosa, who scored a stunning win over Libema Open champion Alison Riske in the first round.